679690 has 32 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 239040.

The previous prime is 679681. The next prime is 679691. The reversal of 679690 is 96976.

679690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×679690² = 923956992200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (679691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3987 + ... + 4153.

It is an arithmetic number, because the mean of its divisors is an integer number (43092).

2⁶⁷⁹⁶⁹⁰ is an apocalyptic number.

679690 is an abundant number, since it is smaller than the sum of its proper divisors (699254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679690 is a wasteful number, since it uses less digits than its factorization.

679690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 679690 is about 824.4331385868. The cubic root of 679690 is about 87.9232284983.

It can be divided in two parts, 6796 and 90, that added together give a palindrome (6886).

The spelling of 679690 in words is "six hundred seventy-nine thousand, six hundred ninety".